Fatigue performance of friction stir welded marine grade steel

Helena Polezhayeva, Athanasios Toumpis, Alexander Galloway, Lars Molter, Bilal Ahmad, Michael E. Fitzpatrick

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

An extensive study on the fatigue performance of friction stir welded DH36 steel was carried out. The main focus of this experimental testing programme was fatigue testing accompanied by tensile tests, geometry measurements, hardness and residual stress measurements, and fracture surface examination. The S-N curve for friction stir butt welded joints was generated and compared with the International Institute of Welding recommendations for conventional fusion butt welds. Friction stir welds of marine grade steel exceeded the relevant rules for fusion welding. This newly developed S-N curve is being proposed for use in the relevant fatigue assessment guidelines for friction stir welding of low alloy steel. Fracture surfaces were examined to investigate the fatigue failure mechanism, which was found to be affected by the processing features generated by the friction stir welding tool.
LanguageEnglish
Pages162-170
Number of pages9
JournalInternational Journal of Fatigue
Volume81
Early online date13 Aug 2015
DOIs
Publication statusPublished - Dec 2015

Fingerprint

Steel
Fatigue
Friction
Friction stir welding
Welds
Friction Stir Welding
Fatigue of materials
S-N Curve
Welding
Fusion reactions
Fusion
Fatigue testing
Stress measurement
High strength steel
Welded Joints
Testing
Failure Mechanism
Tensile Test
Residual stresses
Residual Stress

Keywords

  • friction stir welding
  • low alloy steel
  • fatigue testing
  • residual stresses
  • fracture surface analysis

Cite this

Polezhayeva, Helena ; Toumpis, Athanasios ; Galloway, Alexander ; Molter, Lars ; Ahmad, Bilal ; Fitzpatrick, Michael E. / Fatigue performance of friction stir welded marine grade steel. In: International Journal of Fatigue. 2015 ; Vol. 81. pp. 162-170.
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Fatigue performance of friction stir welded marine grade steel. / Polezhayeva, Helena; Toumpis, Athanasios; Galloway, Alexander; Molter, Lars; Ahmad, Bilal; Fitzpatrick, Michael E.

In: International Journal of Fatigue, Vol. 81, 12.2015, p. 162-170.

Research output: Contribution to journalArticle

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